Make more then one value possible

We needed a solution to have more then one value to be added to to an entity at once.
Rmoved dependencies to some sf2 2.4.1 components.

Because there is a problem with the drush-ops/drush sf2 dependency symfony-yaml 2.2.1 I removed them here.
Merge branch '1.0' of https://github.com/DECK36/drupalextension into DECK36-1.0

Conflicts:
	composer.json